Doh. Of course the solution is not unique. This one is skew symmetric. Any set of contours that fits within the 3 contours will do. I could have added a halfway loft plane with an ellipse cross section and that would have forced symmetry.
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Anything contour that stays within the bounding box defined by square and triangle projection lines will work. Blue is what OnShape generated. Red is what I’d force if I wanted.
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Also reprinting the horns from yesterday. Scaled down 50% with raft. Dunno what all that wispy stray fiber is. Too dry? From supports being printed coarse? PLA spool being not as good? Drip during travel?
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Done. Messed up a bit tried to make the triangle equilateral and the rectangle a square at the same time. Doh. No way to satisfy this template. If you have a square, triangle will be isosceles.
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The horns printed fine but that fuzz is a mess. Not sure it will clean up easy.
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After some cleanup. Not much better.
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Called on the brain trust for help.
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3d printing mavens… any tips for sanding PLA prints down to a smooth finish? @divalbanerjee @h_thoreson @chenoehart
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Much excite. Printing TPU for the first time. If it works I’ll be able to design my own tires 🥳😱
en.m.wikipedia.org/wiki/Thermopla
Just a simple rubbery washer to start with.
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Fingers crossed. Seems to be printing fine. Shiny with some stringing. Used Cura generic presets for TPU-95, whatever that is. Higher nozzle temperature (228F) but lower bed temperature (45) than PLA (205/65)
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Ok it’s ugly and messy and needs a haircut but it basically works.
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ugh broke thread... continues here
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Decent compliance, rather stiff at normal resolution printing with 60% infill. I bet I could get much wider range by messing with infill density. But clearly settings need work. But unlike PETG this feels different enough as a material, it’s worth mastering.
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Reading through this, and any #3Dprinting exposé, I always think of The Law of Conservation of Mass.

